The shapes of galaxies
June 26, 2017
An image of the colliding galaxies NGC4676, "The Mice," as seen by Hubble. An analysis of eighteen thousand colliding galaxies in the computer simulation Illustris has found that mergers like this one are the dominant mechanism determining …more
Since Edwin Hubble proposed his galaxy classification scheme in 1926, numerous studies have investigated the physical mechanisms responsible for the shapes of spiral and elliptical galaxies. Because the processes are complex, however, studies frequently rely on computer simulations as their main tool. The discs of galaxies are believed to form through the collapse of gas which acquires its initial spin in the early Universe. During their subsequent evolution, galaxies undergo a wide range of phenomena, from the accretion of matter—or its outflow—to mergers with other galaxies, all of which modify the disk's spin and angular momentum.
Read more at:
https://phys.org/news/2017-06-galaxies.html#jCp
